Engine · Ignition and Tune-Up
| System | Ignition and Tune-Up |
| Subsystem | Engine |
| Years | 1978–1981 |
| Vehicles | 911SC |
| Confidence | Factory Verified |
Source: Porsche Technical Specifications, WKD 422 720 (911 SC/Turbo 3.3, 78-81 Models), "Engine specifications for 1978, 1979, 1980 and 1981 models (911 SC)", page 17; cross-referenced against Porsche 911 Workshop Manual, Technical Data section ("Technical Data, Type 911 SC - from 1981 Models"), page 53